摘要
根据1989年5月和8月枯、洪水两个季节黄河拦门沙区及河口海区地质和水文调查资料，结合黄河利津水文站近几年的径流量和输沙量变化，对黄河清水沟流路稳定性及其影响因素进行综合分析研究。结果表明，近年来黄河来沙量渐少是清水沟流路稳定的重要因素之一；随着河口向南转向海动力作用较弱的莱州湾，海水沿河上溯力逐渐减弱，河流泥沙得以更顺利地入海，并在口门外沉积；现流路河口海域的水动力作用虽然较弱，但涨、落潮流的分布格局非常有利于泥沙的向外输送，这对减轻河道内和河口区的淤积强度、稳定和延长流路寿命极为有利。
The extremly large amount of sediment discharge from the Huanghe River results in a rapid deltaic progradation and frequent shifting of the river mouth. Usually, anaverage course period of the Huanghe River mouth channel is 12 years. The presentQingshuigou course lastal 19 years from 1976 to 1995, and was still in its better condition. In order to understand the mechanics of the Qingshuigou course stability and the impactfactors, two cruises of investigation were carried out in the Huanghe River estuary duringMay and August, 1989. The data of bottom sediment components by methods of grain sizeand mineral assemblage analysis, suspended sediment concentrations, and temperature andsalinity of sea water were collected at 48 sampling stations. In particular, sedimentation rates at5 stations wer determined by 210 pb dating of shallow cores, and twehty -five hour series datawer collected at each of 4 selected stations in the immediate vicinity of the estuary or inthe Laizhou Bay. Landsat TM images wer used to interpret the suspended sedimentconcentration distribution and transport trend in the estuary area. Synchronouslyhydrological and suspended sediment data were taken at 8 Sections in the river mouth bararea. The variation of water and sediment discharges at the Huanghe River LijinHydrometric Station was also considered. This paper is a comprehensive study on theQingshuigou course stability and the reated factors. The study showed that, 1) decreasingsediment discharge from the Huanghe River was one of the important facors which influental the course stability. 2) With the river outlet gradually turning southward to LaizhouBay with very weak hydrodynamics, the effect of tide upward to the river gets decreaed.This facilitated seaward transport of sediments from the Huanghe River and their deposition in estuary area, 3) Though the tidal range and current velocity were small in the areaof the present river mouth, the flood and ebb tidal current pattem favors the transport ofthe Huanghe River sedments to the outside of th
出处
《海洋与湖沼》
CAS
CSCD
北大核心
1997年第2期165-171,共7页
Oceanologia Et Limnologia Sinica
基金
国家八五攻关资助!859260203
南京大学海岸与海岛国家试点实验室资助!SCIEL21195145
关键词
清水沟
流路
稳定性
黄河
泥沙
洪水
Qingshuigou course Stability Huanghe River sediment discharge
